Introduction - If you have any usage issues, please Google them yourself
Lagrange interpolation, also known as two points interpolated known function y = f (x) given different point x0, the value y0 on x1 = f (x0), y1 = f (x1) linear interpolation is construct a polynomial P1 (x) = the AX PPLS b that it satisfy the condition P1 (X0) = Y0 P1 (x1) = Y1